.item-1 {
    background: url('../img/1.jpg') center no-repeat;
    background-size: contain;
}

.item-2 {
    background: url('../img/2.jpg') center no-repeat;
    background-size: contain;
}

.item-3 {
    background: url('../img/3.jpg') center no-repeat;
    background-size: contain;
}

.item-4 {
    background: url('../img/4.jpg') center no-repeat;
    background-size: contain;
}

.item-5 {
    background: url('../img/5.jpg') center no-repeat;
    background-size: contain;
}